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Profraw files are not produced when using instrument-coverage on freebsd #94616
Description
Running the following command on the calloop repo on a FreeBSD environment:
env LLVM_PROFILE_FILE="calloop-%p-%m.profraw" RUSTFLAGS="-Cinstrument-coverage" cargo +nightly test --all-features
No .profraw file is produced with the latest nightly (which now causes our CI script to fail).
Meta
The files were correctly produced with rustc 1.60.0-nightly (88fb06a1f 2022-02-05), but are no longer produced on rustc 1.60.0-nightly (30b3f35c4 2022-02-17) nor rustc 1.61.0-nightly (10913c000 2022-03-03). This fails on both FreeBSD 13.0 and FreeBSD 12.1 (according to our CI).
Running the command on Linux using rustc 1.61.0-nightly (10913c000 2022-03-03) works as expected, producing the .profraw files.
Activity
nagisa commentedon Mar 4, 2022
For this to be really actionable, it would be great if you could reduce the regression range further. E.g. using https://github.com/rust-lang/cargo-bisect-rustc.
cc #79121
elinorbgr commentedon Mar 4, 2022
As a first range reduction, I can say that
rustc 1.60.0-nightly (30b3f35c4 2022-02-17)is actually the first nightly to have the problem, the previous onerustc 1.60.0-nightly (75d9a0ae2 2022-02-16)works fine.Looking at the associated commit range, an obvious suspect is 30b3f35, which merges #93577, upgrading to LLVM 14. I'll see if I manage to confirm this using cargo-bisect-rustc
elinorbgr commentedon Mar 4, 2022
I confirm that the issue was introduced by 30b3f35.
ci: disable FreeBSD coverage for now
[skip ci] fix tools/coverage.sh after recent toolchain updates
asomers commentedon Aug 5, 2023
@elinorbgr I can no longer reproduce this bug using Rust 1.73.0-nightly and a recent build of FreeBSD 14.
elinorbgr commentedon Aug 26, 2023
Indeed, it seems to work now! Thanks for the ping!